campbell



(No Model.) 6 Sheets-Sheet 1. A. CAMPBELL.

SPEED REGULATOR.

Patented Oct. 19, 1886.

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(No Model.) 6 Sheets-Sheet 2. A. CAMPBELL.

SPEED REGULATOR.

No. 350,971. Patented 001'.. 19, 1886.

WITNESSES: INVENTOR:

By his ./ltorlwys,

6 SheetS-Shet 3.

(No Model.)

A. CAMPBELL.

SPEED REGULATOR.

Patented Oct. 19, 1886.

\7%IZ Y r WITNESSES: INVENTORZ (No Model.) sfsheets-sheet 4. A. CAMPBELL.

. SPEED REGULATOR.

No. 350,971. Patented Oct. 19, 1886.

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N. PETERS. Pnmmrumgnplw. washington. D, c,

(No Model.) 6 Sheets-Sheet 5.

A. CAMPBELL. 1

y SPEED RBGULATQB..v Y

No. 350,971. Patented Oct. 19, 1886.

WITN Essl-2s; WVENTOR:

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aMq, ma m6 6 Sheets-Sheet 6.

(No Model.)

A. CAMPBELL.

SPEED REGULATOR.

Patented Oct. 19, 1886.

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By his .ttorlw m,

WITNESSES:

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NrTnD STATES PATENT FFICE ANDREV CAMPBELL, OF BROOKLYN, ASSIGN OR TO JOHN AND EDMUND MCLOUGHLIN, OF NEV YORK, N. Y.

SPEED-REGULATOR.

SPECIFICATION Application inea Marches, isst.

To all whom, mrtg/ concern.'

Be it known that l, ANDREW CAMPBELL, a citizen ofthe United States, and a resident of Brooklyn, Kings county, New York, have invented certain Improvements in Speed-Regu laters, of which the following is a specification.

My invention relates to that class of speedregulators in which a driver bearing a frictional surface drives another part by frictional contact. The driven part carries a governor which, when the speed increases beyond a fixed limit, serves, by compressing a spring, to reduce the pressure of one frictional surface on the other, and thus keep the speed of the driven part uniform.

My invention will be best understood from the following description and by reference to the accompanying drawings, wherein- Figure l is an elevation of portions of two pulleys provided with my speed-regulator in its most approved form; and Fig. 2 is a section of same, taken on line 2 2 in Fig. l. The next three figures illustrate a modification, Fig. 3 being an elevation, Fig. et a section on line 4 4 in Fig. 3, and Fig. 5 a section on line 5 5 in Fig. Zlit-hat is, a plan with the face of the driven pulley removed. The next two figures illustrate a second modification, Fig. 6 being a sectional elevation on line 6 '6 in Fig. 7, and Fig. 7 a section on line 7 7 in Fig. 6. Fig. S is a detail view in section, which will be referred to hereinafter.

Referring, first, to Figs. 1, 2, and 8, A represents any rotatively-mounted driving-shaft, and B is the driver, keyed or otherwise secured thereto. This driver is in the nature of a disk, wheel, or pulley, and is provided with two laterally-projecting rims or flanges, a and n, which are concentric with the axis ofthe disk. These flanges provide the reA Y quired frictiona-l surfaces for driving.

C is the driven part, which in this case is an ordinary belt-pulley mounted to rotate on the shaft A. I have shown,the pulley mounted on the prolonged boss of the driver, and held in place by aset collar, b,- but it might be mounted directly'on the shaft.

In order that the disk or wheel B may drive forming part of Letters Patent No. 350,971, dated October 19, 1886.

Renewed April 19, 1S86. Serial No. 199,451. (No model.) Y

the pulley O, I provide the mechanism I will now describe. the functions of a governor-ball.A This weight is coupled to a rod, t', which passes through a lug, j, on the arm of pulley O, through a strong spring, l, and is provided with a washer, 7c, and suitable adjusting-nuts, as shown. The expansive force of spring Z tends to draw the weight D in radially toward shaft A; but in order to prevent the spring from exerting its full force on the clamp or brake I arrange a stop, It', on the pulley-boss for the end of rod fi to abut against. The weight D has an arm, l1, which is coupled to a shaft, d, which has a bearing in a lug` dependent from the pulleyrim. Thus the weight may swing on the shaft (l. On this shaft (Z is fixed an arm, g, which is coupled to the weight D, and on the opposite end ofthe said shaft-that is, the endnext the driver B-is fixed a crossarm, e, which bears pins e', that engage recesses in the backs of shoes j' f, which form the friction clamp. These shoes Iprcfer to make of wood secured in metal holders. One of the shoes bears on the outer surface of flange a and the other on the inner surface of flange (t, inthe manner ofv brake-shoes.

It will be seen from the above description that the expansive force of spring Z is exerted to close the shoes j' against their respective flanges, and thus exert a frictional pressure. This I call the centrifugal force,77 and it would act with the full force of the spring, if it were not for the stop k. In an opposite arm, h, on the weight D is mounted a shaft, z, which bears a wheel, u, that stands between the flanges a a', and may bear on either. The diameter of this wheel is nearly equal to the space between a a. On the end of shaft t is a bevel-wheel, s, which meshes with another bevel-wheel, o', on the end of a shaft,q, mounted rotatively in bearings on the weight. On shaft (l is a worm, p, which meshes with teeth 011 a worm-wheel, o, secured to a shaft, m, mounted to rotate in the weight. On the inner end of shaft m is a crank-pin, fn, set eccentric to the shaft, and which engages a groove or slot in the face of arm q. This forms the coupling of this arm to the weight D. Now, by follow! D is aweight, which performs ing this construction it will be seen that if disk B revolves while wheel a is in contactv with flange a the wheel u will be rotated, and

will, by acting through the intermediate parts described, carry the crank-pin n around from its highest toward its lowest position, (or that nearest the shaft A,D and thus draw down arm g, and cause shoes j" f to press forcibly on the flanges a a', y

The weight D does not hang directly on the shaft cl, but in or through arm 7L is fitted an eccentric sleeve, d, which has a nick in its projecting end to receive a screwdriver. By

' turning this sleeve around on the shaft d and in armrhV that end or part of the weight may be thrown outward, and the wheel abe caused then secured by a set-screw, d".

to press on flange a with the required force to obtain the necessary friction. The sleeve is XVe will now suppose that the wheel u is pressing on flange a with a pressure of a few ounces, and the shoes f are standing off free from the flanges a c. The driver is set in motion, and the pulley C stands still for a moment. This sets the wheel n in motion, rolling on c, and said wheel acts through the worm-gear to slowly and powerfully close the shoes f on the flanges a a, the spring t' being the resistance. W'hen this frictional pressure is sufficient to overcome the load on the pulley C, it will start, and the wheel a will then move bodily with flange a and cease to rotate. yIf the speed of the driver increases beyond that for which the driven part is set, the weight D will move ont slightly, and `this will proportionately relieve vthe pressure of the shoes, so that the pulley@ will move at the desired speed,while the driver B will move more rapidly; but this will not set .wheel u in motion, as it will have moved out farther than the weight, as the fulcrum is on d, and the wheel is borne at the extreme end of arm h.

Should the shoes j" wear away, this wear' will always be taken up by wheel u at starting, and this is one of the important advantages of this wheel.

Should the load on the pulley at starting be great, the wheel u will of course bring the shoesf up to their respective' flanges with force enough to start this loadand then when the pulley reaches its proper speed, as before stated, the wei ght will move slightly and carry wheel u out until its outer -face is nearly in Contact withthe outer flange, a. New, if the larger part of the load be suddenly thrown off from thepulley C, it will start suddenly at a more rapid speed, and this will throw out the weight far enough to bringthe wheel u in contact with flange a', which will set it revolving, but in an opposite direction. This will have the effect to reversetheformer motion of shaft m, the arm g will be moved upward or out, and the shoesf be set back totheir first position. This employment of the outer flange,

. a', to act on the wheel u to run it back adapts my regulator to machinery where the power is suddenly thrown off and on, and avoids the injury that might arise from the continued setting out of the brake-shoes. It also assists in quickly relieving thebrake or clamp when the power is thrown off.

here the load is usually even and is not liable to sudden shifts, I may employ the construction illustrated in Figs. 3, 4, and 5. In this only one flange ct is employed, and the slices f are arranged to clamp on opposite sides of it. The Worm-wheel o is arranged in a hollow or recess in the weight, and the pulley C is mounted directly on shaft A, a washer, e, being arranged between the hubs or bosses of B and C. In other respects the construction is the same as that shown in Figs. land 2.

Fig. 5 shows the arm 7i, ofthe weight and the eccentric sleeve d in section, and it also` serves to illustrate the arrangement of the grooved arm g and the crank-pin u, which are the same as those in Figs. l and 2.

I prefer to construct the wheel u as best seen in Fig. 5, where itis shown in section. I employ a metal core, a rubber-ring cushion, u', and an outer metal ring ortire. clamped between two metal washers, as clearly shown. The rubber imparts a little elasticity to the wheel, and yet does not affect its durability.

As the wooden shoes f, which form the clamp or brake,will require to be replaced frequently, and as it would require considerable time to free them from the flange far enough to remove themvif the worm-wheelo were fixed on -the shaft m, I employ the construction shown in detail in Fig. 8.

The crank n is secured to or forms a part of the shaft on, and on shaft m is fitted a sleeve, m', on which the wheel o is fixed. A nut, m, on the end of shaft m clamps the sleeve between the crank n and a washer on which the nut impinges. New, the nut clamps all the parts rigidly together, but if it be loosened the crank may be moved around without disturbing wheel o, and by this means the pinseon cross-arm e maybe disengaged from their recesses in the metal holders of the shoes f.

I have spoken of shaftm,wheel o, and crankpin n as all rigidlyand permanently connect ed together, in order to simplify the description, and they might be so constructed; but for the reasons given I prefer the construction shown best in the detail View, Fig. 8.

It may be well to explain more fully that the spring l has an excess of strength, and if the stop It" were omitted the spring would have power enough to break off or bend the shaft of wheel fu; but in setting the wheel u up to the flange c by means of the eccentric sleeve d the spring serves as a resistance, as it does also when the wheel u sets the brakeshoes up to the flange or flanges a. The tension of the spring l is regulated by the nuts on the end of rod i, and the weight D cannot move outward without compressing the spring. Soit will be seen that it is the wheel u that adjusts the .9C These are.

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. movement of wheel a will exceed that of the weight proper.

In Figs. t5 and i I have shown a modification of myspeed-regulator, in which themeans for regulating the pressure of the brakeshoes is not automatic, the wheel a being supplanted by other mechanism for setting up the brake-shoes by hand. In this construction I have shown the weight D mounted on a lever, E, hinged tothe pulley-rim.

I have shown the pulley C provided with a web in lieuof arms, and have broken this web away in Fig. G to better show the clamp er brake. The shaft d has its bearing in the web of the pulley. The arm g is coupled to a link, r, which has a strap that embraces an eccentric, n, on the shaft m., and on the other end of shaft m is secured a toothed wheel, o. rIhis wheel meshes with a rack, p', which slides in bearings on the pulley-web, which rack meshes with a pinion, q', mounted rotatively in bearings on the pulley. lVith this pinion meshes another rack, r', arranged to slide or play parallel with the pulley axis in suitable bearings on the pulley. The shaft-bearing t is screw-threaded, and on this is screwed a nut, s', which may be made to press against the end of rack r and move the latter endwise in its bearings. As the rack i" is borne by the rotation ofthe pulley C, and the nut s is stationary, I prefer to mount a friction-roller, r", in the end of the rack where it impinges on the nut. By means ot' nut s the eccentric 1L may be rotated, and the shoesj' brought up to flange a with the proper pressure to start the load, and also to take up the wear of the shoes. The racksp and r and pinion q are designed only to change the motion at right angles.. The eccentric n here shown might be substituted for the crank and pin shown in the other tigures, and a worm and wormwheel might take the place ofthe racks and pinions herein shown. The shaft m is or may be constructed as shown in Fig. s. In fact, there are various ways in which these details may be constructed, and I do not limit myself to that shown in all respects.

In Fig. (i I have shown the stop 7d as formed on the lugj, so as to take under lever E. This construction takes the strain off from ,j when the pulley is at rest, as the pressure is equal on its upper and lower sides.

In lieu of two shoes, j', one might be made t0 `serve, but I prefer two, as shown. The trictional surfaces herein shown are planes, but this is not absolutely necessary. For example, the tlange (t might present a V shape in cross-section.

Having thus described my invention, I claim` l. In a speed-regulator wherein a centrifugallyactuated governor is employed to relieve the pressure ot` one frictional surface 0n the other, the friction-brake borne by the driver, in combination with means, substantially as described, for adjusting the pressure of said brake to thepload, and for taking up the wear of the brake-sh0es, substantially as set forth.

In a speed-regulator wherein a centrifugally-actuated governor is employed to relieve the pressure of one frictional surface on the other, the combination of a frictional brake or clamp and the automatically actuated mechanism, substantially as herein described, for adjusting the pressure of the brake to the load, and for taking up the wear on the brakeshees, substantially as set forth.

3. The combination of the anged driver, the driven pulley or part, the governor, with its limiting-stop It', the brake or clamp coupled t0 the governor-weight, as shown, the wheel u, mounted rotatively in the weight, and the mechanism, substantially as shown, whereby the rotation of wheel a is caused to act on the brake or clamp, all arranged to operate substantially as set forth.

4. The combination,with the driver and the driven pulley or part, 0f the weight D, hung on shaft (l, its coupling-rod t', and spring Z, a limiting-stop for the spring, the Wheel u,1nounted on the weight and adapted to roll on the flange a, the shaft d, and the eccentric sleeve d, all arranged substantially as shown, whereby the pressure of the wheel u on a is regulated, as described.

5. The combination of the brake shoe or shoes, the shaft d, arm c, arm g, shaft m, the crank and pin borne by said shaft m, the wormwheel o, shaft t, wheel u, and mechanism, substantially as described, for connecting wheel a with wheel o, all arranged to operate as set forth, whereby rotation of wheel u acts on the brake, as set forth.

Gjfllhe combination, with the driver provided with two concentric flanges, a and a', of the pulley C, the governor-weight and its spring, the clamp or brake constructed substantially as shown and coupled to the governor-wcight, as set forth, the wheel u, mounted on the weight and arranged between the ilanges (l and a', and the mechanism., substantially as described, whereby the rotation of said wheel a is caused to clamp and release the brake, substantially as set forth.

7. The combination, with the brake-shoes fand their metal holders, ofthe cross-arms c, provided with pins c, the shaft d, the grooved or slotted arm y, the cranlepin and crank n a', the headed shaft lnl., sleeve m, nut m, and wheel o, secured to sleeve lm', all constructed and arranged substantially as shown, in order that the slices ofthe brake maybe readily removed.

8. The combination. in a speed regulator, of a clamp borne by the driven part, consist- IOO IZO

ing of two shoes arranged to clamp on aflange z In Witness whereof I have hereunto signed on the driver, a Spring' borne by the driven my name in the presence of two subscribing [o part arranged to clamp by its tension the said witnesses.

shoes on the said ange, and a Weight borne K 7 y l by the driven part and arranged to be moved ANDRE CAMPBELL outward by centrifugal force and to compress `Witnesses:

said spring and release said clamp, all subl HENRY CONNETT,

s bantially as set forth. ARTHUR C. FRASER. 

